Energy conservation device



FIG. 1 is a perspective view of the energy conservation device of the present invention showing my new design with the dotted lines depicting solely environmental structure and forming no part of the claimed design;

FIG. 2 is an end view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a front elevational view thereof. 

The ornamental design for an energy conservation device, as shown and described. 